When Adam was 130 years old, he had a son in his own likeness, after his own image; and he named him Seth.
3. And begat a son in his own likeness . We have lately said that Moses traces the offspring of Adam only through the line of Seth, to propose for our consideration the succession of the Church. In saying that Seth begat a son after his own image, he refers in part to the first origin of our nature: at the same time its corruption...
The first words of the chapter are the title or argument of the whole chapter: it is the book of the generations of Adam; it is the list or catalogue of the posterity of Adam, not of all, but only of the holy seed who were the substance thereof (Isa 6:13), and of whom, as concerning the flesh, Christ came (Rom 9:5), the names, ages...
Commenting on Genesis 5:1-5
And Adam lived an hundred and thirty years,.... The Septuagint version, through mistaken, gives the number two hundred and thirty years: and begat a son; not that he had no other children during this time than Cain and Abel; this is only observed to show how old he was when Seth was born, the son here meant; who was begotten in his own likeness, after...